| A | This mineral is Anthropogenic. |
| G | This mineral is directly dated. |
| B | This mineral is reported as having this age. |
| Y | This mineral is using an age reported as an element mineralization period. |
| O | This mineral is using an age calculated from all data at the locality. |
| R | The age displayed for this mineral originates from a different, non-child locality. |
| P | The age displayed for this mineral is the range of ages for this mineral at all of this locality's children. |
| This mineral's age has not yet been recorded. |
| Clay | Kaolinite | None | Not in a structural group | Tourmaline |
| Dickite (*) | Dravite (*) | Sillimanite (*) | Strengite (*) |
| Mineral name | Structural Groups | IMA Formula | Max Age (Ma) | Min Age (Ma) | # of Sublocalities containing mineral | LOCALITY IDs, not mindat ids | # of localities containing mineral |
|---|---|---|---|---|---|---|---|
| Dickite (*) | Clay Kaolinite | Al2Si2O5(OH)4 | 0 | 651 | |||
| Dravite (*) | Tourmaline | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) | 0 | 648 | |||
| Sillimanite (*) | Not in a structural group | Al2SiO5 | 0 | 1516 | |||
| Strengite (*) | None | Fe3+(PO4)·2H2O | 0 | 263 |
All locality data graciously provided by mindat.org
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